Below is a series of steps Mel took to solve an equation. She got the wrong answer. Find Mel's mistake. Then, use order of operations and solve for x.

Answer: x = 9
Mel's mistake was in the last step, she multiplied by 2 instead of dividing by 2
Step-by-step explanation:
2x + 1 = 19
Subtract 1 from each side
2x = 18
Divide by 2
x = 9